Ultimaker 1 and 1.75 filament

[cips 1]

Hello experts.

Anyone of you tried to convert the Ultimaker 1 to use 1.75 filament?

I found this procedure:

http://cargocollective.com/scottmayson/Ultimaker-1-75mm-Filament-Conversion

It looks quite straightforward, but I'd like to ask your exeperience if someone tried to do it and if there is something specific to know.

Thanks for your help.

cips

 

[aaron 2]

I have a previous thread about converting the UM1 to 1.75 and its Pros and Cons. We decided the benefits of 3mm outweigh the benefits of 3mm.

 

[duesentrieb 0]

We decided the benefits of 3mm outweigh the benefits of 3mm.

 

???

Do you have a link. Could not find it. The search function really sucks...

[jonnybischof 59]

Imho there is a simple case that favors 3mm filament over 1.75mm:

Assumption:

Both 3mm (which is actually 2.85mm) and 1.75mm filaments are manufactured with +-0.05mm diameter tolerance. 1.75mm doesn't go lower than 0.05mm (I believe that is pretty much impossible anyways).

Conclusion:

2.85mm +-0.05mm = 1.8% diameter error tolerance

1.75mm +-0.05mm = 2.9% diameter error tolerance

Note that there is also +-0.1mm tolerance filament. This would make things even worse for 1.75mm filament (5.7% diameter error tolerance vs 3.5% for 3mm).

So to me it's clear that 3mm filament should be favored over 1.75mm, because variations in filament diameter result in uneven extrusion which gets you bad prints.

 

[Daid 284]

On the other hand, with 1.75mm you have less volume in the melting chamber, which results in better retractions. And you need a weaker feeder for 1.75.

 

[aaron 2]

Agreed. However, for UM purposes, 3mm is far superior.